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though it is a "Signed file, verified signature" as in the report, 5 engines report it as malware. where can i know what type of malware it represents as detected by the individual engines? ie., where can i get the characteristics of a particular type of malware as it is categrised by a virus engine? in simple words, is there an online database of malware and their functionalities, as understandable by the layman?

TROJ_GEN is Trend Micro's generic detection for files exhibiting suspicious behavior (which includes many PUP's). The F47V0223 at the end indicates it is a variant of the generic detection. Threat names with Generic are a very broad category and can overlap with those classified as PUPs because of their sometimes harmful or suspicious behavior.

Kaspersky's classification of not-a-virus seems to confirm the PUP classification. Not-a-virus detections can include any number of different programs to include those which are benign as well as risky to use.

Since the file is related to an acceleration-tool for bittorrent I would agree it more accurately is a PUP.

Anti-virus programs general scan for malware which includes viruses, Trojans, worms, rootkits, bots, etc. PUPS do not fall into any of those categories and that is the primary reason some AV's do not detect or remove them. That would also explain the virustotal results where only 5 scanning engines detected the file.